<?php
/**
 * Created by PhpStorm.
 * User: lenovo
 * Date: 2016/9/22
 * Time: 22:09
 */
    header('Content-type:text/html;charset=utf-8');
   $name='熊爱明';
  $score=85;
  if(is_int($score)||is_float($score)) {
      if ($score >= 90 && $score <= 100) {
          $str = 'A级';
      } elseif ($score >= 80 && $score <= 90) {
          $str = 'B级';
      } elseif ($score >= 70 && $score <= 80) {
          $str = 'C级';
      } elseif ($score >= 60 && $score <= 70) {
          $str = 'D级';
      } elseif ($score >= 0 && $score <= 60) {
          $str = 'E级';
      } else {
          $score = '学生成绩范围必须在0-100!';
      }
  }
  else{$score='输入的学生成绩不是数值！';}
  echo "<h2>学生成绩等级：</h2><<p>学生姓名：".$name."<p>学生分数：".$score."分<p>成绩等级:".$str;
